Antminer S7 Whisteling sound

[Plaagdier]

Hi there. I have bought some S7 Antminers from www.bitmart.co.za and they have this whistling sound that is tearing through your brain like a chainsaw. the only way i can prevent the whisteling sound is if i stick tape on the grid to try and restrict the airflow a little. Anyone else have this issue? what else can i do?

[1715382595]

1715382595

[1715382595]

1715382595

[VRobb]

Hi there. I have bought some S7 Antminers from www.bitmart.co.za and they have this whistling sound that is tearing through your brain like a chainsaw. the only way i can prevent the whisteling sound is if i stick tape on the grid to try and restrict the airflow a little. Anyone else have this issue? what else can i do?

Yeah, mine does that when the fans are spinning close to max.  I set my fans manually to a more pleasant % setting, watching temps of course.  Got some other fans I'll be swapping out - was able to get my s5 to quiet down considerably, I'm pretty hopeful the same can be done with the 7's!

[philipma1957]

Yeah set your fans at 55% here is a secret top speed on these fans is about 4400

And 65-70% setting will get you to that 4400 level

55% should get you around 3500 to 3800 rpm

Do that and see if temps remain at 60 to 65 c

[RadekG]

You can remove whistle sound by adding spacer between pull fan and miner. I used non working 12cmx25mm fan with removed propeller. Now I can use fan at 100% speed without ferry whistle.